22 results about "Aortic stent" patented technology

The present disclosure provides a stent for an aorta, the stent having a longitudinal axis defined between a first end and a second end of the stent. In the radially expanded state, the second end has an oval cross-sectional shape in a plane perpendicular to the longitudinal axis. The stent comprises first and second radiopaque markers. There is also provided a stent system comprising the stent for an aorta as a first stent, and a second stent for crossing over the common iliac arteries. The second stent has an aperture between its first and second ends, and the first stent is configured to couple to the second stent. A method of implanting the stent is provided. A method of implanting the stent system is also provided.

The invention discloses an aorta covered stent and an aorta stent system, and belongs to the technical field of medical instruments.The aorta covered stent comprises a tubular covered film, end outer wave-shaped stents are arranged on the outer walls of the two ends of the tubular covered film, and an end inner wave-shaped stent is arranged on the inner wall of at least one end; the wave troughs of the end inner wave-shaped stent are fixedly connected with the end of the tubular covering film, the wave crests and the wave crests of the end outer wave-shaped stent are arranged in a staggered mode, and the connecting beams connecting the wave crests and the wave troughs are slidably connected to the end of the tubular covering film at intervals. The aorta stent system comprises a stent conveying system and an aorta covered stent. The stent conveying system comprises a conveying catheter and a stent conveyor. After the end part of the aorta covered stent is compressed, the wave crest of the wave-shaped stent in the end part can extend out of the port of the tubular covered stent to be hooked and loaded with a stent conveying system; after the aorta covered stent is released, the wave crests of the corrugated stent in the end part can be shrunk into the tubular covered stent, so that stimulation to aorta blood vessels is avoided.

The internal leakage prevention structure comprises a plurality of separation blade single bodies arranged on the outer surface of the covered stent, each separation blade single body comprises a separation blade main body and a supporting wire, the separation blade main body is in a blade shape or a flipper shape, a roughening structure is arranged on the surface of the separation blade main body, and the supporting wire is arranged on the surface of the separation blade main body. One end of the support wire is connected with the catch main body, and the other end of the support wire is fixedly connected with the covered stent; a certain included angle is formed between the blocking piece single bodies and the side wall of the covered stent, part of the blocking piece single bodies are arranged around a pre-windowing hole of the covered stent, the rest of the blocking piece single bodies are arranged on the outer surface of the covered stent in a multi-position scattered mode, and the multiple blocking piece single bodies integrally form a breakwater-shaped structure. After the speed of leaked blood flow is reduced, thrombus is slowly generated, the leaked blood flow is naturally blocked, and therefore the probability of internal leakage is reduced.

Techniques and features to reduce air that may be released during deployment of an endoluminal device (e.g., a thoracic aortic stent graft device). In addition, methods for quantifying the effectiveness of pre-treatment techniques and features that reduce such air are discussed herein. This air reduction may help reduce the risk of air embolism occurring during deployment of a device (e.g., an implant, e.g., a stent graft), which may potentially reduce the risk of negative effects caused by such embolism.

A system and method of remote guidance and alignment for endovascular fenestration of a vascular prothesis placed intraluminally that includes a flexible magnetic guide sheath having a magnetic distal end. An implantable magnetic stent for intraluminal placement in proximal end of a target artery providing magnetic guidance outside the endovascular aortic stent graft prothesis for accurate aperture formation in the vascular prothesis for subsequent placement of covered branch stents thereto.

An implantable medical device including a frame operable to transition between a delivery configuration and a deployed configuration, a tubular member supported by the frame and defining a side wall, wherein the tubular member defines a lumen extending therethrough and at least one fenestration defined by the side wall, and a valve supported by the frame and positioned upstream from the at least one fenestration when implanted in an ascending aorta.

The utility model discloses an aorta abdominalis covered stent and a stent system, and belongs to the technical field of aorta abdominalis covered stents. The utility model provides an aorta abdominalis covered stent which comprises a stent body, and a first through hole, a second through hole and a third through hole are formed in the stent body in the longitudinal direction of a cylinder. The middle section of the support body is provided with an open groove, the second through hole and the third through hole are broken through the open groove, and the first through hole is not broken through the open groove. Therefore, according to the aorta abdominalis covered stent, the aorta abdominalis stent can be communicated with the four branch arteries. The first through hole is not affected by the open groove and penetrates through the stent body, and therefore it can be guaranteed that blood in the aorta abdominalis is smooth all the time. The slotting does not need to be customized according to the condition of a patient, and professional batch production can be realized, so that the manufacturing efficiency and the use reliability are improved.

The invention relates to the technical field of intravascular stents, and discloses an aortic stent and an aortic stent split conveying device.The aortic stent comprises a first stent section, a second stent section and a connecting piece, one end of the first stent section is arranged in one end of the second stent section in a sleeved mode, and the connecting piece is connected between the first stent section and the second stent section; the traction device is used for pulling the second stent section which expands before the first stent section, and when the first stent section and the second stent section are both in the expansion state, the part, located in the second stent section, of the first stent section abuts against the second stent section. The split conveying device comprises an inner core and an outer sheath, the outer sheath comprises a first sheath section and a second sheath section which are movably arranged outside the inner core in a sleeving mode, and the second support section and the first support section are sequentially released by moving the first sheath section and the second sheath section back to back. The release stability and accuracy are better, and the risk of injury to the blood vessel wall is smaller.

The application relates to an aortic stent and a manufacturing method thereof. The manufacturing method of the aortic stent comprises the following steps: providing a proximal stent section for being implanted into a descending aorta, a distal stent section for being implanted into an ascending aorta, and an arch stent section for being implanted into an aortic arch; providing a foldable covering film; covering the covering film on the proximal stent section and the distal stent section; providing a keel line with a pre-bent shape; and penetrating the keel line through the proximal stent section, the arch stent section and the distal stent section; wherein the proximal stent section, the arch stent section and the distal stent section jointly define a supporting cavity, the covering film is foldable, and the keel line has the pre-bent shape. The whole stent can be bent along the bending direction of the keel line, so that the elastic straightening force of the aortic stent itself can be reduced, the flexibility of the aortic stent is improved, and the complications caused by poor adhesion are reduced.

Devices, systems, and methods for patient-specific, custom-designed fenestrated implants. Various examples involve abdominal aortic stent-grafts with custom-designed fenestration features for perfusion of the renal arteries, mesenteric arteries, and / or celiac trunk arteries.

The present application relates to cardiovascular disease medical equipment technical field, disclose a kind of aortic covered stent, the aortic covered stent includes support stent, closure layer and elastic connecting layer, closure layer is spaced apart and is set to the outer periphery of support stent, closure layer includes first covering, elastic connecting layer is connected between support stent and closure layer, blood flow can flow between support stent and closure layer;With aortic pulsation, closure layer and elastic connecting layer produce elastic deformation, so that first covering is always close to aortic and the blood vessel wall adjacent to closure layer.The aortic covered stent can be better applied to the special form of ascending aortic dissection and the mechanical characteristics of blood flow, higher stability, better closure for ascending aortic wall.

The invention relates to a stent for placement at an aortic annulus that is expandable from an undeployed state to a deployed state comprising a stent frame having rows of cells with a proximal section and a distal section at a longitudinal axis of the stent, the stent frame being formed by a plurality of arms, the arms being connected to one another at connection points, and wherein the plurality of arms forms a plurality of diamond-shaped stent cells, in particular the rows of cells, formed of vertices at said connection points between the arms, a dry valve made out bovine pericardium arranged at least at the distal section of the stent with the dry bovine pericardium being configured to be rehydrated with a solution, a skirt surrounding the dry valve and comprising at least one of bovine pericardium and polyester, and one or more eyelets arranged at a distal end of some of the arms, with the eyelets being configured to fix the valve to the stent frame.

The invention discloses an aortic stent graft system and device for reconstructing an aortic arch upper branch, and relates to the technical field of medical instruments. The branch stent is arranged close to the proximal end of the main stent and is used for reconstructing a head-arm trunk artery; the net-shaped window structure is arranged at the telecentric end, close to the starting part of the branch stent, of the side wall of the main stent, and the net-shaped window structure is used for follow-up operation of reconstructing the left subclavian artery; a window structure is formed in the side wall of the main body stent, is located between the branch stent and the net-shaped window structure and is used for arranging a short stent, and the short stent is used for reconstructing the left common carotid artery. An aorta disease lesion part can be repaired through a total femoral artery approach, the near-end anchoring area is moved forwards to the brachial trunk artery, and the brachial trunk artery, the left common carotid artery and the left subclavian artery are subjected to intracavitary reconstruction which completely conforms to a physiological anatomical structure and is along the blood flow direction by being combined with the integrated single branch stent in a telescopic mode.

The present invention discloses an aortic stent graft and an aortic stent graft assembly, belonging to the field of medical device technology. The aortic stent graft includes a main stent graft and a branch stent graft; the main stent graft is provided with a mounting port; the branch stent graft includes an external port and an internal port, the edge of the external port near the upstream side is connected to the mounting port through a first diaphragm, the first diaphragm has a first outer convex surface and a first inner concave surface arranged oppositely; the edge of the inner port near the downstream side is connected to the mounting port through a second diaphragm, the second diaphragm has a second outer convex surface and a second inner concave surface arranged oppositely; the first diaphragm and the second diaphragm are connected by a third diaphragm, and the first diaphragm, the second diaphragm and the third diaphragm seal the mounting port. The assembly includes a connecting stent graft and the above-mentioned aortic stent graft. It can form an aortic stent graft that does not require opening the patient's healthy blood vessels, has a wide range of applications, is highly flexible, and takes up little compressed space.

A minimally invasive circulatory support platform that utilizes an aortic stent pump or pumps. The platform uses a low profile catheter-based techniques and provides temporary and chronic circulatory support depending on the needs of the patient. Further described is a wirelessly powered circulatory assist pump for providing chronic circulatory support for heart failure patients. The platform and system are relatively easy to place, have higher flow rates than existing systems, and provide improvements in the patient's renal function.

The application provides an aortic stent releasing device for a vascular endovascular intervention robot, which comprises a driving mechanism, a control mechanism and an aortic stent, wherein the aortic stent comprises a stent base and a releasing handle; the stent base has a mounting end and a driving end; a self-expanding stent is sleeved on the mounting end, and a tightening sleeve is sleeved outside the self-expanding stent; the releasing handle is sleeved on the first position of the driving end; the driving mechanism can drive the releasing handle to move towards the second position of the driving end, so that the tightening sleeve is separated from the self-expanding stent, the self-expanding stent is self-expanded, and the mounting end is separated from the self-expanding stent when the stent base moves away from the self-expanding stent; and the control mechanism is signal-connected with the driving mechanism. The aortic stent releasing device uses a power device to replace human hands to complete stent releasing, reduces the operation risk caused by human factors, is simple to operate, stable and reliable, and has high practicability.

This invention relates to an in-situ vascular puncture sheath, comprising a hollow tube body. The hollow tube body has two corresponding side holes on its two opposite sidewalls near its front end, each hole penetrating the inner and outer surfaces of the tube body in the same radial direction. Each side hole also has a lateral slit at its front end, connecting to the side hole and extending forward. The two slits, starting from the top of the front end of the side hole and extending forward, gradually slope towards the same side of the hollow tube wall until they merge to form a guidewire release slit, facilitating guidewire disengagement from the hollow tube body. The opening width of the lateral slit and the guidewire release slit is equal to or slightly larger than the diameter of the guidewire used to pass through the two side holes. By positioning the side holes of the in-situ vascular puncture sheath at the branch vessel opening using a guidewire, in-situ puncture and fenestration of the aortic stent graft at the branch vessel opening can be performed through the opposite side hole. This method offers advantages such as accurate fenestration positioning, convenient surgical operation, and avoidance of arterial damage.

The application discloses a kind of aortic stent plane automatic positioning and related index measurement method. Obtain postoperative patient three-dimensional medical image data and carry out standardization processing;Identify and segment aortic stent and its related anatomical structure, extract stent three-dimensional point set;Determine horizontal reference plane and longitudinal reference plane based on point cloud spatial distribution, and position stent bottom / top plane accordingly;Combine coronary artery opening position to construct coronary plane, generate parallel section between stent bottom plane and coronary reference plane and determine Waldeyer's sinus plane;The intersection of the plane and image data obtains two-dimensional section, calculates the area, perimeter and other geometric indexes of stent and aortic section and outputs result.The method realizes postoperative key plane automatic positioning and quantitative measurement, improves evaluation efficiency and consistency.

The application discloses an aortic covered stent and an aortic stent system, and belongs to the technical field of medical devices. The aortic covered stent comprises a tubular covering, and the outer wall of the two end portions of the tubular covering is provided with an end portion outer wave-shaped stent; the inner wall of at least one end portion is provided with an end portion inner wave-shaped stent; the trough of the end portion inner wave-shaped stent is fixedly connected with the end portion of the tubular covering; the peak is arranged in a staggered mode with the peak of the end portion outer wave-shaped stent; and the connecting beam between the peak and the trough is in a sliding connection mode on the end portion of the tubular covering. The aortic stent system comprises a stent conveying system and the aortic covered stent, and the stent conveying system comprises a conveying catheter and a stent conveyor. After the end portion of the aortic covered stent is compressed, the peak of the end portion inner wave-shaped stent can extend out of the end portion of the tubular covering, and is in a hooking and loading mode with the stent conveying system; after the aortic covered stent is released, the peak of the end portion inner wave-shaped stent is contracted into the tubular covering, so that the stimulation to the aortic blood vessel is avoided.

A main stent-graft (22) is provided that includes an internal support channel (120) disposed within a generally tubular main fluid flow guide (28). When the internal support channel (120) is in a collapsed state, a distal channel-fluid-flow guide end opening (127B) of a channel fluid flow guide (128) faces radially inward. When the internal support channel (120) is in an expanded state and the main stent-graft (22) is in a radially-expanded deployment state, the distal channel-fluid-flow guide end opening (127B) faces at least partially distally within the main fluid flow guide (28). An elongate member (160A, 160B) is removably positioned passing sequentially through (a) a proximal main-fluid-flow guide end opening (27A), (b) a longitudinal portion (142) of a main fluid flow lumen (29) of the main-stent-graft fluid flow guide (28), (c) the distal channel-fluid-flow guide end opening (127B), and (d) a main-fluid-flow guide lateral opening (30) to outside the main fluid flow lumen (29). Other embodiments are also described.

A stent-graft (222) is provided that includes a fluid flow guide (28) shaped so as to define proximal and distal fluid-flow guide end openings, (27A, 27B), a fluid flow lumen (29) therebetween, and a fluid-flow guide lateral opening (30). The stent-graft (222) is removably disposed within a delivery catheter (80A) with the distal fluid-flow guide end opening (27B) facing a distal catheter end (82). A sheath-rail guidewire (50C) is removably positioned passing sequentially through (1) the delivery catheter proximal to the proximal fluid-flow guide end opening (27 A), (2) the proximal fluid-flow guide end opening (27 A), (3) a longitudinal portion of the fluid flow lumen (29), (4) the fluid-flow guide lateral opening (30) to outside the fluid flow lumen (29), and (5) the distal catheter end (82). A nosecone (86) is removably coupled to the distal catheter end (82). A fixation tube (248) is disposed at least partially distal to the nosecone (86). The sheath-rail guidewire (50C) is coupled to an external surface of the fixation tube (248). Other embodiments are also described.

The present invention discloses a step-by-step release aortic stent graft, comprising a tubular graft and an annular support frame. Connectors for threading a release guidewire are axially arranged on the graft from the proximal end to the distal end, with the connectors arranged in at least two axially spaced rows. The present invention provides a step-by-step release aortic stent graft that enables precise positioning during the release process and offers high stability during assembly.